English Daily: Help with Vocabulary, slang, and essay writing.

ESL Town: Listening practice, games, and quizzes

Dave's ESL Cafe: Phrases, idioms, slang, pronunciation help

English Listening Library: Listening practice

Phonetics Flash Animation Project: Pronunciation and listening practice

Randall's ESL Listening Lab: More listening practice

Glossaries by Language: Dictionaries with both English and other languages

New York Times Learning Network: Practice English skills with current events